Principal English Translation:
below, down below, underneath (see Molina and attestations)
Alonso de Molina:
tlatzintlan. abaxo, o debaxo.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 143r. col. 1. Thanks to Joe Campbell for providing the transcription.
abaxo. tlani. tlatzintlan.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1555, part 1, Spanish to Nahuatl, f. 1r.
Frances Karttunen:
TLATZĪNTLAN below, beneath, underneath / abajo o debajo (M) T has the additional gloss ‘in the south,’ reflecting local geography, since Tetelcingo is situated on land that drops away to lower altitudes to the south. See TZĪN-TLI, -TLAN.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 301.
Attestations from sources in English:
çan quechcotonalloque cenpohuallonchiuhiuhcnahui yn omoteneuhque mimicque auh yn intzonteco oncan tepilolcuauhticpac quinçaçalloque, auh yn intlacnacayo oncan quincallaquique yn contadoria tlatzĩtla = 29 of the said dead were only decapitated and their heads stuck on top of the gallows. They put their torsos in the royal accounting office, down below, (central Mexico, 1612)
Annals of His Time: Don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin, James Lockhart, Susan Schroeder, and Doris Namala, eds. and transl. (Stanford: Stanford University Press, 2006), 224–225.
Attestations from sources in Spanish:
yehuatl yn moteneuhtia tlatzintla = los cuales abajo se relacionarán (Cuautitlan, Tepozotlan, 1639)
Vidas y bienes olvidados: Testamentos en náhuatl y castellano del siglo XVII, vol. 3, Teresa Rojas Rabiela, et al, eds. (México: CIESAS, 2002), 208–209.
tlatzintlan teneuhticate = yuso escritos (Ciudad de México, 1585)
Luis Reyes García, Eustaquio Celestino Solís, Armando Valencia Ríos, et al, Documentos nauas de la Ciudad de México del siglo XVI (México: Centro de Investigación y Estudios Superiores en Antropología Social y Archivo General de la Nación, 1996), 188.